Ore concentration



RICK, a citizen of the Patented ecd 1.2, 1922. a

HUGO snwaan rnnnarox, or SAN TWENTY-THREE arm raiser-rota f-raa'ncrsco,carrroanra, asszerton or onn-nunnannrns ran can-r 'ro wrinnrarr E.

BISSELL, TWENTY-THREE. AND THIRTY-THREE ONE-HUNDREDTHS PER, @ENT '20FRANK S. SINNICKS,

AND TWENTY-THREE AND THIRTY-THREE ONE-EUNDREDTES PER CENT TOGEOBJGE J.HENRY, ALL 0E SAN FRANCISCO, CALIFORNIA.

can cononmnarrori.

No Drawing. Application filed December-11, 1918,

To all whom it may concern:

Be itknown that I, How EDWARD Fann- United States, residing at SanFrancisco, in the county certain new and useful Improvements in Oreration of the ore values.

My present invention is based on the discovery that acridine and itsderivatives, and salts of the same, are highly useful as flotation aents in'the said process of concentration 0 ores. T

The acridine series of hydrocarbons herein referred tocomprise certainorganic bases found in coal-tar and wood-tar, or are pro-- thedistillation of other organic duced by substances, such as bones, hair,hoofs, etc, or are otherwise obtained. My present invention includesbroadly the utilization 10f such agents, irrespective of the mannerin beobtained. be used in carrying out my. which are included within whichthey may The agents to invention, and

the term acridine series of hydrocarbons,

in this Specification and in the claims, are acridine and itsderivatives, and salts of the same. Mixturesof the same may be used.

The said acridine series of hydrocarbons may be obtained from tarresidues, tar-oil, acid-tar, wood-tar, or other organic distillationproducts, such. as bone oil, by well- -known processes, and need not bepurified 'or be wholly free from other constituents of said substances,which constituents, however, act not only as diluents, but act deleofSan Fran-' cisco and State of California, have invented serial no.aeeaae. Renewed an 11, 192a Serial no. steam.

teriously the process and interfere with the beneficial action of saidacridine series.

The following may be given as an example of my process:

small amount of the flotation agent conslstlng substantially ofacridine, or a derivative or salt thereof, either-concentrated ormixedwith water, or other solvent, is added to and mixed with the ore pul tobe treated, 1n an suitable way. The pu p is then subjecte to mechanicalagitation, or to direct aeration without a itation, as by passing air,or other gas, thereinto through a porous mechum, as inthe bubbles columnrecess.

The amount of the reagents u ed will vary somewhat with different oresand has been found by me inpractice to be between 0.15 pound to 0.75pound per ton of dry ore.

With someore .p'ulps it may be desirable to add either sinall amounts ofacid or of alkali, depending upon the nature ofthe ore pulp beingtreated.

A characteristic feature of the hereinmentioned reagents is the factthat they exercise an exceedingly great selective action, causing themineral to float quickly and practicall free from gan e.

While have disclosed t e use of acridine, .its derivatives and salts asflotation .agents in the concentration of ores, and hereinafter claimthe same, it will'be understood that such rea nts may be used as aboveoutlined, either a one or in combination with other reagents, which mayact as'diluents, or which maybe used for the pur ose of facilitating theaction of the acridlne, but that such agents should not be used to actdeleteriously or interfere inv a marked manner with :the beneficialaction of the acridine, its derivatives and salts.

- What I claim and desire to secure by Letters Patent of the UnitedStates is:'

1. The process of concentrating ores, which consists in subjecting apulp of finely di-.

' gas int-o such mixfwre ti cause tha fluimtion m1 separatism 0f themetal-liferous matter from the; gangue.

5,. The process 01f concentrating ores, which consists in subjecting a,pulp of fin sly divided ore and water to fine action of a, flotationagent, consisting substantially Wholly of a small proportion of anacrfline constituem3 amnuming to a fraction of one ound per $011 ofdryare treated, and intro ucing 10 gas into said mixwre 0 cause theflotation and separation of the metalliferous matter from the ganguel Intesfimony whereaf, I have subscribad my name. HUGO EDWARD FREDERICK.

